Hyper-V: Host going to sleep while VM's still run. Is it possible?

Operating Systems & Open Source Windows
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So I found this superuser Q&A:

One more thing, Hyper-V isn’t actually installed on the host OS. When you install Hyper-V you think it’s being installed on top of a host OS but it is not. The setup converts the original OS in something like a VM and puts the hypervisor below. This is what is called the root or parent partition of Hyper-V. That’s why you experience the same speed in what you see as the “real machine” and the virtual machines.

So if that’s true, then Hyper-V should be able to let the “host OS” go to sleep while still running the “guest machines”.

How would this be achieved if it is possible?

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I think you’d find that whilst the “host OS” on top of HyperV is itself a guest, it may need to be running to assist with management and control of the hypervisor platform underneath it.

Thus, i think putting it to sleep, even if possible, is probably a bad idea.

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